EBS Daisy Chain Cables with Flat contacts
With a similar design as the EBS flat patch cables, these super slim cables distribute DC power to your pedals without getting in the way of anything else, allowing for tight and neat looking pedalboard setups. The cables are available in 1 to 2 (DC-2-90F), 1 to 4 (DC-4-90F) and 1 to 6 (DC-6-90F), and can be chained together to supply as many pedals you like from a DC power supply, like the EBS AD9 Pro.
Price from $6.95. The cables are shipping now.

EBS AD9 Pro, 9V DC Power Supply
The AD9 Pro is a compact DC power supply that only occupy the space of one socket outlet, without interfering with surrounding sockets. It provides 1000 mA stable and hum free power which is enough to power up to 20 pedals with a single supply.*

Estimated price $39 The AD9 Pro is ready to ship now.

*The total need is depending on the pedals power consumption. The estimation of 20 pedals is based on the most common consumption levels of effects for bass and guitar.